. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE INTEGUMENTAEY APPENDAGES. 803 Fig. 373. can perceive that it is essentially constituted by adipose tissue.) Numerous blood-vessels and nerves complete this structure. B. The Keratogenous Membrane, or Subcorneus Integument.—The keratogenous membrane envelops the extremity of the digit, by spreading over the terminal expansion of the tendon of the extensor pedis, through the medium of a fibrous fascia—a dependency of the lateral cartilages; and also over the inferior moiety of the external face of these cartilages, th
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE INTEGUMENTAEY APPENDAGES. 803 Fig. 373. can perceive that it is essentially constituted by adipose tissue.) Numerous blood-vessels and nerves complete this structure. B. The Keratogenous Membrane, or Subcorneus Integument.—The keratogenous membrane envelops the extremity of the digit, by spreading over the terminal expansion of the tendon of the extensor pedis, through the medium of a fibrous fascia—a dependency of the lateral cartilages; and also over the inferior moiety of the external face of these cartilages, the bulbs of the plantar cushion, pyramidal body, anterior part of the plantar face of the third phalanx, and over the anterior surface of the same bone. It covers all these parts like a sock, and the hoof incloses it, as a shoe does the human foot. Tliis membrane becomes continuous with the skin of the digital region at a circular line that intersects the middle portion of the second phalanx, and inclines obliquely downward from behind to before. Below this line, in front and laterally, the subungular tissues form a semicylindrical pro- tuberance, covered with villi, and designated the " ; (This elastic prominence has received several most inappropriate names from English farriers and hippotomists, such as " coroijary ligament," " coronary substance," '* cutiduris," etc. From its function, structure, situation, and its analogy to the plantar cushion, I have designated it the " coronary ;) On the plantar cushion and the lower face of the pedal bone, this mem- brane is also a villous tunic—the velvety tissue, which is continuous, towards the bulbs, with the extremities of the coronary cushion. The portion spread over the anterior face of the third phalanx constitutes the laminal or *'leafy tissue," so called because of the laminsB or parallel leaves seen on its sur- face. The three regions of the keratogenou
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
